Topic1Pollutionhascausedtoomanyproblems.SectionAThekeypointsanddifficultpoints1.Keypoints:Wordsandphrases:bee,butterfly,mess,shame,several,pollute,waste,villager,destroy,cutdown,goodness,pour,seesb./sth.dosth.,seesb./sth.doingsth.,cutdown,mygoodnessSentences:Whatashame!/Whatamess!Theflowersandgrasshavegone!Whathashappenedhere?Therebesth./sb.doingsth.Thereareseveralfactoriespouringwastewaterintothestream.Everythinghaschanged.Grammar:differencesbetweenSimplePastandPresentPerfecttense.2.Difficultpoints：正确使用therebesth./sb.doingsth.来表达“有某人/物正在做某事”。区别使用短语seesb./sth.dosth.和seesb./sth.doingsth.。能正确地以口头和书面形式区别使用一般过去时和现在完成时。Teachingprocedures:Stage1GettingstudentsreadyforlearningGreetandtalkabouttheweather.LeadtheSstodiscusstherightplaceforapicnic.Stage2Lead-inLettheSsdiscusswheretohaveapicnic.Encouragethemtostatethereasons.Stage3Pre-listeningPresenttwopicturesoftheWestHillanddescribethechanges.Teachthenewwordsandsomedifficultsentences.Stage4While-listeningStep1:LettheSslistento1atwiceanddo1balone.Step2:LettheSslistento1aagainandpayattentiontothepronunciationandtheintonation.Thenpractice1aingroupsandroleplayit.Stage5Post-listeningStep1:LettheSsread1aaloudandfilltheblanksin1cingroups.Step2:LettheSsobservethepicturesandstudytheexamplein2andtrytomakenewdialogsaccordingtothepicturesandthegivenwords.Thenactoutthedialogs.Step3:LeadtheSstolookatthepicturesandlistentothesentencesoncetonumberthem.Thenlistentothemtwicetocompletethesentences.Stage6SummarizingandAssigninghomeworkStep1:SumupthemaincontentofthisclassandthekeypointsStep2:HMK:Writeapassageaboutpollutioninsomeplaceyouknow.2.Talkabouthowmanykindsofpollutionyouknowandmakealist.
